Algebra.Com's Answer #180080 by richwmiller(17219)![\"\"](\"/images/stars/stars-13.gif\")  
You can put this solution on YOUR website!
We are going to use a little trick to solve this.
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document.write( "Substitute u for t^2
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document.write( "That gives us
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document.write( "u^2-11+18=0
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document.write( "we can solve with the factoring, quadratic formula or complete the square
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document.write( "factoring is the easiest
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document.write( "(u-2)(-9)=0
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document.write( "u=2
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document.write( "u=9
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document.write( "but u=x^2 so
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document.write( "+\- means plus or minus
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document.write( "+\-t=sqrt(u)
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document.write( "so we have four solutions
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document.write( "t=+\-sqrt(2)
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document.write( "t=+\-3
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document.write( "see below to use the quadratic formula
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document.write( " | Solved by pluggable solver: SOLVE quadratic equation with variable | \n" );
document.write( "Quadratic equation  (in our case  ) has the following solutons:
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document.write( " For these solutions to exist, the discriminant  should not be a negative number.
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document.write( " First, we need to compute the discriminant :  .
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document.write( " Discriminant d=49 is greater than zero. That means that there are two solutions:  .
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document.write( " Quadratic expression  can be factored:
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document.write( " Again, the answer is: 9, 2.\n" );
document.write( "Here's your graph:
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